new(options) public

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# File activerecord/lib/active_record/validations/uniqueness.rb, line 6
      def initialize(options)
        if options[:conditions] && !options[:conditions].respond_to?(:call)
          raise ArgumentError, "#{options[:conditions]} was passed as :conditions but is not callable. "                                 "Pass a callable instead: `conditions: -> { where(approved: true) }`"
        unless Array(options[:scope]).all? { |scope| scope.respond_to?(:to_sym) }
          raise ArgumentError, "#{options[:scope]} is not supported format for :scope option. "              "Pass a symbol or an array of symbols instead: `scope: :user_id`"
        super({ case_sensitive: true }.merge!(options))
        @klass = options[:class]
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